Salem Online provides digital access to reference materials, covering literature, history, and health. It also includes city, business, and country information.
- Magill’s Literary Annual from 1977 to the current year, reviewing significant fiction and nonfiction titles published each year.
- A selection of Salem's Critical Insights books
- A selection of Salem's award-winning Working Americans series
- Consumer health encyclopedias
- Searchable Directories provided by Greyhouse:
- Nations of the World 2017
- America's Top Rated Cities, 2016
- America's Top-Rated Smaller Cities